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ACQUISITIONS - Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination (Details) - EdgeRock Technology Holdings, Inc - USD ($)	6 Months Ended
	Jun. 28, 2020	Feb. 03, 2020
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 11,274,000	$ 11,274,000
Covenants not to compete
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired	$ 302,000
Useful life	5 years
Client partner lists
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired	$ 3,972,000
Useful life	5 years
Trade name
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets acquired	$ 7,000,000

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(1)
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